montgomery



RIOHD. MONTGOMERY, or NEW lYORK, N.- r.

GORRUGATING METAL-PLATES.

Vs.peeineeti m ef Lettere Patent Ne. 10,549, dated February e1,;1s54.

'ing drawing ofthe same, making part of this specification, in which- Figure l'represents a plan of machinery embracing my improvements; Fig. 2 represents a longitudinal section through the front or feed rolls; Fig. 3 represents a transverse section taken at the line w' of Fig. 1, showing a plate for a beam in its passage through the rolls and dies, where the depth of the folds is shallowest; Fig. 4 a transverse section through the crimping dies at the line :j of Fig. l, where the depth of the folds is greatest; Fig. 5 an elevation of the crimping die detached, showing the configuration and bell-mouthed shape of the entrances to the spaces, in passing through which the plate is crimped; and Fig. 6 a longitudinal section of the crimpingvdies at the line 8, 3, of Fig. l, showing the configuration of the spaces at the rear or delivery side of the dies. The dotted red lines in the two last iigures show the diminution in the width of the space from the bell mouth to the rear side of the die; while the increased height of the spaces, corresponding to the diminution in their width, is shown in Figs. 3 and 4.

My improved method of operation consists in passing a plate a number of times through a pair of grooved rolls, and a stationary crimping die, by which the folds of the beam are gradually brought to theV proper depth without endangering the rupture of the metal, which is unavoidable when the corrugation of folds of any considerable depth is effected by rollersalone.

The rolls (A and vB) as shown in the drawing are made to match together, in such manner as to leave spaces (a, o, c, d) between them, corresponding in length to the width of the plate to be corrugated. The spaces are all of a length measured in the line of their sinuosities, the several folds becoming nearer each other just in proportion as they increase in depth so that the distance between the opposite sides of the beam measured in a straight line is least when the folds are deepest, and Vgreatest whilethe 'corrugations .are shallowest, the beam in this way diminishing in width as it increases in depth. The upper and lower rolls are in outlineY thefcounterpart ofeach other sothat the openings between ,them are of uniform depth and just equal ,tothetthick-f ness of the lplate of which the beam is to be made. In rear of these rolls a crimping die is placed which consists oftwoblocks with grooves (Z, m, n, o) ,across them, opposite and on a level with the openings (a, o, o, d) i .These between` the rolls '(A, and B). grooves at the end neXt the rolls are bellmouthed `to facilitate the entrance of the plate between'them, while their transverse curvature within the bell-mouth, corresponds to that of the openings between the rolls; these grooves however become grad-v ually narrower and deeper, as'rthey approach -the opposite side of the die, so that when a plate is forced throughthem from the rolls, its folds will be deepened, and brought nearer together in proportion to thedegree of taper of the grooveewhen theplate* .Y leavesthe groove of the die, the depthof its folds and their distance apart will correuNirED srari'is 'P'ArnNr'orrionl i spond to the size of thev opening in the rolls,

adjacent to that through which vit last passed, in order lthat itmay enter thereinV freely, and be further crimped by being forced through another groove of the die adjacent tov the` last it passed through. In

ves

this way the rcrimping `is effected chiefly by l the die. For'the purpose of more readily passing the plate through the die, a pair of rollers may be'placed in rearliof it to seize j the protruding end, as 'it is forced through the die by vthe action of the rolls in front so that when the front rolls have lost their hold of the plate, its passage through the die mayy be effected'by the rolls in rear.

In case the die should be placed somewhat .'95VV Or oneplate ,Y f ymay be forced through the die after it leaves lower or higher at its rear side than the openings between the back rolls, the beams ymade by this arrangement would be arched. This effect would be produced still better by curving the lgrooves in the die block so as to correspond to the arch or curvature in the beams which it is 'desired to make.

As the frame work in which the rolls are supported and adjusted is of the usual construction, I have not deemed it necessary to describe it particularly; and with regard to theV construction Voir' the crimpingV die, it is only necessary to say that it is made in two parts which meet in the plane of! the grooves; the grooves forming the upper side of the die, are ymade in the under side oftheV upper half or block, and those formingthe under side, in .the upper side of the lower i half or block; these two halves of the die-are firmly bolted together, Vand to the bed frame of the rolls, so that during the operation the strain may not displace them.` Y

What I claim as my invention and desire to secure by Letters Patent is The method herein described of forming Vcorrugated Inetal beams by passing a plate lof metal of the proper size through a series 20 of grooves between rolls, and through a sires of crimping dies substantially as herein set forth.

In testimony whereof, I have hereunto Y subscribed my name.

R. MONTGOMERY. i

Witnesses SAML. 1 GRUBB,

PETER HANNAY. 

